<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  .my-text{
    border: none;
    resize: none;
    overflow: inherit;
  }
</style>
<body>
  <textarea class="my-text" >
    
  </textarea>
</body>
</html>